kyleisNOTmyname

This is reproducible without modifications, in singleplayer, in both 26.2 and 26.3-snapshot-7.
This allows you to see entities that are invisible. This includes other players, which gives anyone who knows about this issue an unfair advantage in multiplayer servers.

Below is footage of the issue in 26.2 and 26.3-snapshot-7.

Can confirm as well and added 26.3-snapshot-5 to the affected versions.

Could not reproduce in 26.2-snapshot-4 or 26.1.2.

I recommend attaching a video of the issue.

Can confirm as of 26.2 Snapshot 4

I recommend attaching a video and a crash log.

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

Can confirm as of 26.2-snapshot-4

I am unsure what you want me to check and I am also not a moderator.

Can confirm as of 26.2-snapshot-4
-I recommend changing the affected versions to match the snapshot I just listed.

Can confirm as of 26.2-snapshot-3

Duplicate of MC-134 and is marked as working as intended.

Also present with Sulfur Spikes as of 26.2-snapshot-3
(as shown in this ticket MC-307614)